| 防 | fáng | to protect; to defend; to guard against; to prevent |
| 反 | fǎn | contrary; in reverse; inside out or upside down; to reverse; to return; to oppose; opposite; against; anti-; to rebel; to use analogy; instead; abbr. for 反切[fan3 qie4] phonetic system |
| 编译 | biān yì | to translate and edit; translator-editor; (computing) to compile (source code) |
| 电报 | diàn bào | telegram; cable; telegraph; CL:封[feng1],份[fen4] |
| 加密 | jiā mì | to encrypt; encryption; to protect with a password |